<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>
<body>
    <div id="app">
        <button @click="isHot=!isHot">改变天气</button>
        <div>
            <h1>以下是今天的天气播报</h1>
            <!-- v-if接受一个布尔值,控制元素是否渲染出来到浏览器中 -->
            <p v-if="isHot">今天天气贼热</p>
            <p v-if="!isHot">今天天气微凉</p>
        </div>
    </div>
    <script>
        Vue.config.productionTip=false;
        const vm=new Vue({
            el:"#app",
            data() {
                return {
                    isHot:true
                }
            }
        })
    </script>
    
</body>
</html>